Flat mop



FIG. 1 is a front perspective view of a flat mop which embodies our design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof,

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof.

The bottom view is unornamented and not considered a part of the claimed design.

The broken lines shown are for illustrative purposes only and form no part of the claimed design.

The use of the discontinuous rendering of the mop handle represents indeterminate length. 

The ornamental design for a flat mop, as shown and described. 